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Today's Topics:
1. DHCPv6: is it possible to have a fixed prefix delegation for
a host while allowing the IPv6 address assigned to be dynamic?
(Erik Andersen)
----------------------------------------------------------------------
Message: 1
Date: Tue, 29 May 2018 22:00:00 -0700
From: Erik Andersen <eander...@eoni.com>
To: dhcp-users@lists.isc.org
Subject: DHCPv6: is it possible to have a fixed prefix delegation for
a host while allowing the IPv6 address assigned to be dynamic?
Message-ID: <69883cbb-0dad-cf49-ec23-9c7c597cb...@eoni.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I would like to hand out static DHCPv6 prefix delegations to hosts based
on their client-id.
I currently have a system of include files that includes on file for
each host.
Those files have something like:
host 3c906af6703a {
??????? host-identifier option dhcp6.client-id
00:03:00:01:3c:90:6a:f6:70:3c;
??????? fixed-prefix6 2607:f248:320:130::/60;
}
They are included in part of a pool6 in a subnet6:
??????? pool6 { # For normal/WAN clients, not DOCSIS
??????????????? allow unknown-clients;
??????????????? deny members of "docsis";
??????????????? # Range for clients
??????????????? range6 2607:f248:102:10::10 2607:f248:102:10::ffff;
??????????????? # Range for clients requesting a temporary address
??????????????? range6 2607:f248:102:10::2:0/112 temporary;
??????????????? # Include static prefix delegations
??????????????? include "/etc/dhcp/staticpdinclude.conf";
??????? }
But when a client is requesting a non-temporary address and a prefix
(and is covered by a host definition), the response packet says there is
no available address, and the log shows:
Unable to pick client address: no addresses available? - shared network
2607:f248:102:10::/64: 0 total, 0 active,? 0 abandoned
Why wouldn't the host directive inherit the range6 definition and use
something from that range?
Is it possible to have a dynamically picked non-temporary address
assigned to a client, along with a fixed delagated prefix? If so, can
someone share an example configuration that does that?
Thanks,
Erik
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